Steel-tired wheel.



No. 856,598. PATBNTED JUNE 11., 1907' I. E. MOGRAOKEN & E. S. WOODS.

STEEL TIRED WHEEL.

APPLICATION rmm 11:13.25, 1907.

" UNITED STATES PATENT ()FFICE.

.ISAAO n MOGRAOKEN, or wiLIiINsBuae, PENNSYLVANIA, AND EDWIN S. WOODS,OF CHICAGO, ILLINOIS, ASSIGNORS 'ro JOHN nwoons, or

. CHICAGO, ILLINOIS.

STEEL-TIRED WHEEL.

Specification of Letters Patent.

Patented June 11, 1907 Application filed February 25, 1907. Serial No.359.263.

- ments in Steel-Tired l/Vheels and we do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the'letters of referencemarked thereon, which form a part of this specification This inventionrelates to improvements in steel tired wheels for railway cars and likeuses, and the invention consists in the matters hereinafter set forthand more particularly pointed out in the appended claims.

Among the Objects of our invention is to strengthen the connectionbetween the tire and the inner frame or center of the wheel.

A further object of the invention is to provide an improved connectionbetween the tire and the inner frame so arranged as to prevent theexpansion of the tire, due to heat caused by the action of thebrake-Shoe there,- on, from shearing the bolts connecting the tire withthe inner frame.

In the drawings :Figure 1 is a side elevation of a wheel embodying ourinvention, with parts broken away to show construction otherwiseconcealed. Fig. 2 is an axial section thereof. Fig. 3 is a fragmentarydetail of the tire illustrating one of the features of our invention.Fig. 4 is a detail illustrating a modification, the section beingindicated by the line 44 of Fig. 1.

As shown in the drawings, the wheel consists of an inner frame or centerembracing a hub A and a spider A which is herein shown as made integralwith the hub, and a surrounding flanged, steel tire B rigidly attachedto said inner frame or center. Said inner frame or center is of spiderform, as herein shown, it comprising an inner and an outer ring-likeportion a and a joined by radial connecting arms a In the type of wheelherein shown the inner frame embraces as part of its construction platesC C attached to the cast portion of the inner frame by bolts D D andSaid plates constitute means for attaching the tire to the inner frame.To this end, said plates have overlapping engagement at their peripheralmargins with the Opposite faces of an annular, inwardly extending flangeB of the tire, and bolts E E extend through registering apertures in theoverlapping parts of said plates and the annular flange B of the tire tofasten the tire to the inner frame. The plates are apertured to fitclosely over the hub A of the wheel, and fit closely at theirperipheries within annular rabbets I) b formed between the flange B andmain body of the tire.

In accordance with our invention the tire, in addition to the attachingfeature just mentioned, is further connected with the inner frame orcenter by means preventing relative rotation of said parts, therebyavoiding any tendency of a shearing action on the bolts E due to suchrelative rotation. This interlocking connection is afforded, as hereinshown, by means of lugs A A which are made integral with and extendradially of the inner frame and enter notches b formed on the inner faceof the annular flange or rib B of the tire. Said notches, as hereinshown, open to both sides of said flange or rib, and the lugs A fit witha close or driven fit in said notches,

The purpose of the construction described is to provide an interlockingconnection between the inner frame or center and the tire, such as willabsolutely avoid relative rotation of the tire and frame, thus producingnot only a more rigid and reliable connection between the two parts ofthe wheel, but also relieving the bolts E which connect the tire withthe inner frame of the shearing stress brought thereon, in the absenceof the lugs, upon tendency of one of the parts to rotate relatively tothe other. The construction shown and described permits the lugs A to bemade of ample width and as strong as is necessary to produce therequired rigidity of connection between the parts.

In accordance with another feature of our invention, the bolts E bywhich the tire is attached to the inner frame or center are so related,in dimensions, to the bolt openings through which they pass as to permitthe tire to expand or enlarge, when heated, without exerting stress onthe said bolts tending to shear them. This result may be effected bydesigning the bolts to fit closely within the openings of the innerframe or center and loosely within the openings of the tire, or viceversa. As shown in Figs. 1 and 2, the said bolts E fit closely withinthe bolt openings of the plates C and extend through bolt openings oftherim or flange B of the tire that are made of greater cross-sectionalarea than said bolts. In fitting the parts together and locating thebolt holes in this arrangement, said parts are so disposed that thebolts normally engage the sides of the bolt holes nearest the peripheryof'the tire. The bolts may be so arranged in the bolt holes 6 as tothemselves prevent relative rotation of the tire and the wheel center orframe, as shown, for instance, in the broken away portion of Fig. 2.That is to say, each alternate two bolts E for this purpose may engagethe sides of the bolt holes through which they pass remote from eachother, circumferentially of the wheel. This arrangement of the bolts isespecially useful in the absence of the interlocking connection betweenthe tire and inner frame just described. As shown in Fig. 4 the bolts Efit closely within the bolt holes of the tire, but fit loosely withinthe bolt holes 0 of the plates C of the inner frame. In thisconstruction the shanks of the bolts normally engage the radially innersides of said bolt holes.

The purpose of the construction and arrangement just described is topermit the expansion of the tire, due to the action of the brake-shoethereon, without bringing a shearing stress upon the attaching bolt E.It is well known that the braking action of the shoe on the tire highlyheats the tire, and produces a substantial enlargement or expansionthereof. In wheels of this construction heretofore made, wherein theattaching bolts fit tightly in the bolt openings of the tire and innerframe through which they pass, such expansion has a tendency to producean enormous shearing action on said bolts with the result of destroyingtheir in tegrity and making it necessary to replace said bolts. It is tobe understood that our invention is capable of general adaptation towheels of the general construction herein shown, embracing an innerframe or center and a separate tire attached thereto by bolts oranalogous fastening devices, and we do not wish to be limited to theconstruction herein illustrated, except as hereinafter made the sub jectof specific claims.

We claim as our invention 1. A wheel comprising an inner frame and atire, interlocking parts on said frame and tire preventing relativerotation thereof, and means not piercing the frame and tire at saidinterlocking parts for fastening the tire to the inner frame.

other part to prevent relative rotation thereof, and means not piercingsaid lugs for fastening the tire to the inner frame.

3. A wheel comprising an inner frame and tire, said frame having a partwhich fits in overlapping engagement with the tire, interlockingconnections between the frame and tire preventing relative rotationthereof, and means located intermediate said interlocking connectionsfor fastening said tire to the inner frame.

4. A wheel comprising an inner frame and tire, said frame having a partwhich fits in overlapping engagement with the tire, said tire beingprovided with a plurality of radial notches, lugs on the frame engagingsaid notches, and bolts extending through apertures in said overlappingparts intermediate said interlocking lugs and notches.

5. A wheel comprising an inner frame and tire, plates attached to thesides of the frame and overlapping the tire at their peripheral margins,bolts extending through openings in the overlapping parts of the platesand tire, and interlocking connections between the frame and tire actingto prevent relative rotation of the parts.

6. A wheel comprising an inner frame and a surrounding tire, platesattached to the sides of said frame and overlapping the tire at theirperipheral margins, bolts extending through openings in the overlappingparts of said plates and tire, said tire being provided with a pluralityof radial notches, and lugs on the frame engaging said notches.

7. A wheel comprising an inner frame and a tire, said framehaving-overlapping engagement with the tire, and bolts extending throughopenings in said overlapping parts, I the bolt openings in one of saidparts being-0f larger cross-sectional area than the bolts, said boltsbeing so disposed relatively to the margins of said openings, radiallyof the wheel, as to permit expansion of the tire without exertingshearing stress on the bolts.

8. A wheel comprising an inner frame and a tire, said frame havingoverlapping engagement with the tire, and bolts extending throughopenings in said overlapping parts, the bolt openings in one of saidparts being of larger cross-sectional area than the bolts, and saidbolts being so arranged, relatively to each other and to the sides ofthe bolt openings circumferentially of the Wheel, as to prevent relativerotation of the tire to the frame.

9. A Wheel comprising an inner frame and a tire, plates attached to thesides of said frame and overlapping at their peripheral margins saidtire, bolts extending through openings in said overlapping parts, thebolt openings in one of said parts, to wit,.the plates or the tire,being made of larger crosssectional area than the bolts, said boltsbeing so disposed relatively to the margins of said openings, radiallyof the wheel, as to permit expansion of the tire without exertingshearing stress on the bolts.

10. A wheel comprising an inner frame and a tire, said frame havingoverlapping engagement with the tire, bolts extending through openingsin said overlapping parts, the bolt openings in one of said parts beingof larger cross-sectional area than the bolts, and parts on said framehaving interlocking engagement with said tire to prevent relativerotation thereof.

In testimony, that we claim the foregoing as'our invention, we affix oursignatures in the presence of two witnesses, the said MC ORAO EN, atIVilkinsburg, Allegheny county,

ISAAC E. MdCRACKEN. a EDWIN s. woons.

IVitnesses to the signature of Isaac E. Mc- Cracken:

THOMAS DAVIS, JOHN J. GALLAGHER. Witnesses to the signature of Edwin S.Woods:

W. L. HALL, GEORGE R. WILKINs.

